Reinforcing-back for brake-shoes.



FITZ WILLIAM SARGENT. REINFORCING BACK FOR BRAKE SHOES.

APPLICATION FILED SEPT. 13. I915.

Patented Nov. 2, 1915.

IIIHII ll A TTORNEY FITZ WILLIAM SARGENT, OF MAHWAH, NEW JERSEY,ASSIGNOR TO AMERICAN BRAKE SHOE & FOUNDRY COMPANY, OF MAHWAH, NEWJERSEY, A CORPORATION OF NEW JERSEY.

REINFORCING-BAC K FOR BRAKE-SHOES.

Specification of Letters Eatent.

Patented Nov. 2, 1915..

Application filed September 13, 1915. Serial No. 50,355.

To all whom it may concern:

Be it known that I, Frrz l/VILLIAM SAR- cnN'r, a citizen of the UnitedStates, and a resident of Mahwah, in the county of Bergen and State ofNewJersey, have made and invented certain new and useful Improvements inReinforcing-Backs for Brake- Shoes, of which the following is aspecification.

This invention relates to reinforcing backs for brake shoes, and has forits object to provide improved means for preventing the straighteningout and spreading of the reinforcing back, and the opening up of thelug, should the body metal of the shoe, disposed directly beneath thelug, become fractured and broken.

A further object is to provide a tie-plate for brake shoe backs withoutwardly looped lugs, wherein the tie-plate is so secured to the backand upon opposite sides of the lug that it is not dependent upon thecast body metal of the shoe for its securement and anchorage.

A further object is to provide a reinforcing back having longitudinallyextending openings therein, the same being of such extent as toterminate a considerable distance short of the lug portion of the back,and about the adjacent end walls of these recesses are bent theextremities of a tie-plate, the overlapping of the ends of the tie-plateresulting in the most secure anchorage of the latter to the back, and,at the same time, not in any way interfering with the attachment of thebrake shoe to a brake head.

Other objects and advantages will appear as the description proceeds,wherein it is to be understood that changes in the precise embodiment ofmy invention can be made within the scope of what is claimed, withoutdeparting from the spirit thereof.

The preferred embodiment of my invention is disclosed in theaccompanying drawings, wherein Figure 1 is a view in top plan of ablank, from which my improved reinforcing back is formed; Fig. 2 is aview in longitudinal vertical section of a reinforcing back embodyingthe characteristic features of my invention; Fig. 3 is a fragmentalview, in perspective of the looped portion of the shoe, and clearlydisclosing the manner in which the tie-plate is anchored to thereinforcing back upon opposite sides of the looped lug;

Fig. 4: is a view, in vertical central section of a brake shoe having myimproved reinforcing backembodied therein; and Fig. 5 is a detailed viewin perspective of the tie-plate.

Referring specifically to the several views, the blank, illustrated inFig. 1, is formed from an oblong plate 10, the central and lugformingportion 11 of which is provided with the spaced and symmetricallyarrangedopenings 12, these openings being adapted to receive the shoeattaching key after the blank has been shaped to its final form. Locatedupon opposite sides of the lug portion l1 are the longitudinallyextending openings 13, and into which the molten metal of the body ofthe shoe flows to thereby lncrease the anchorage therefor. Theseopenings 13, are of limited extent and terminate short of the lugforming portion 11, so that the confronting end walls 14 of theseopenings are positioned remote from the side walls of the looped lug.

The blank is subjected to the action of suitable forming dies, by whichit is curved in its length and the central and lug portion 11 isoutwardly formed to present the integral and looped lug 15, the openings12 in which define suitable key openings. The tie-plate 16 in the formof an elongated thin strip of metal, and approximating in width thewidth ofthe recesses 13, is positioned beneath and across the looped lug15, and the ends 17 thereof are bent up and around the ends 1 1 of therecesses 13. In this manner, the tie-plate is rigidly and permanentlyanchored to the back and upon opposite sides of the lug, so that theback is held against spreading and the lug against opening up. Theefiicient anchorage of the tie-plate is, therefore, not dependent uponthe cast metal of the body of the shoe, so that the lug is held againstopening up and the back againt spreading regardless of the degree towhich the body of the shoe becomes fractured or broken or the amount ithas become worn. The provision of a separate tie-plate allows it to beformed of material not necessarily the same as that used for theformation of the reinforcing back.

The reinforcing back, as thus constructed, is placed in a mold, and thebody metal 18 of the shoe cast thereon, with the result that the bodymetal lying directly beneath the open lug, is reinforced throughout bythe tie-plate 16. Although the cast metal of the body of the shoe may,to some extent, supplement the securement between the ends of thetieplate, and the reinforcing back, the. securement of the tie-plate isnot dependent thereupon, as the overlapping extremities effectivelyaccomplish this end. The position of the end walls 14 of the recesses 13remote from the sides of the lug, prevent the interference of theseoverlapping ends of the tie-plate with the brake head.

What I claim is:

1 A reinforcing back for brake shoes in-' eluding a looped lug andprovided with longitudinally extending recesses arranged to thesides ofthe lug, and a tie-plate extending beneath said lug with the ends,thereof interlocking with the ends of the aforementioned recesses. r

2. A reinforcing back'for brake shoes including a looped lug andprovided with 1ongitudinally extending recesses, arranged upon oppositesides of said lug, and with the confronting end walls thereof spaced adistance from the side walls of the lug, and a tie-plate extendingbeneath and across the said lug with the ends thereof extending intocontact and interlocking with the confronting end Walls of saidrecesses.

3. A brake shoe comprising a reinforcing back with a looped lug, saidback provided with recesses arranged upon opposite sides of said lugwith the adjacent ends thereof terminating a distance from the sides ofsaid lug, a tie-plate projecting beneath and across the said lug withthe ends thereof being bent into engagement and interlocking with theend walls of said recesses, and a body anchored to the said back andtie-plate.

Signed at Mahwah in the county of Bergen and State of New Jersey this10th day of September A. D. 1915.

FITZ WILLIAM SARGENT.

Witnesses:

R. O. AREeoN, Gr. T. STUART.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). G.

